Rear differential 97 f-350
i went to my local ford dealer and bought 4 qts of rear end fluid and a 8oz bottle of friction modifier. After i drained the old oil reattached the cover and filled the case back up i noticed that i only used 3 full quarts the 8oz of FM and about a 3rd of the 4th bottle of oil if that. My question to whoever has done this themselves is did i use enough to properly fill the case back up? According to the manual 7.5pints were to be used. 2 pints in a qt so i should have used 3 and a half quarts. The oil did start coming out of the fill hole but i was not on a complete level surface. i really do not want to pull the plug again to add more but if i need to than i will. What do you guys think? Did i use enough to fill it up?